Although valid source Glitch Cities like those from the Safari Zone exit glitch (http://glitchcity.info/wiki/Safari_Zone_exit_glitch) are well-known, not too much research has been into the 'pure' glitch maps with their own map IDs.

These are the current glitch maps with articles.

http://glitchcity.info/wiki/Category:Glitch_areas

Practically it's probably not going to be viable to make an article about every non-freezing map, since there are a huge number of possible maps in Gold/Silver/Crystal (65536 for each version) unless a tool is created to find the glitch maps that do not freeze the game.

If you find a glitch map that doesn't freeze the game in any revision of Red/Blue/Yellow, Gold/Silver/Crystal let me know and I will make an article about it, and have fun glitching! :) Do note these maps do not seem to be that common, although not many have been researched.

It's a place in Cherrygrove City with the Violet City/Olivine City theme playing.

When entered via Prof. Elm's laboratory door, making one step north or west may reset the game in a glitch dimension.

If you step down enough via walk through walls, it may take you to an unknown other map in Pewter Gym with the Pokémon Gym theme playing (may actually be Brock's gym).

If you step right enough via walk though walls, the game may freeze.

Edit 1:

This is also the same glitch map ID in Japanese Crystal (01f13ed0, 01213fd0). The map is on Johto's Route 39 and plays the Team Rocket HQ music, but as soon as you enter the glitch map the game may freeze and/or fade to a white screen.

I'm making a bot to investigate map scripts in R/B/Y. It should give results this month, I'm making sure it gives correct results.

[EDIT]It seems the map script isn't the only thing that causes crashes... I actually suspect incorrect sound banks to also be a thing, since (for example) map $69 crashes after wCurMap changes (which means the map header, including the map script are loaded), but before RunMapScript is called even once, and the crash seems to happen right after the music fades out.

I tried hex A9 on Midori 1.0 (Green) and no interesting results, it was a Cinnabar Lab Glitch City. Nothing unusual besides a Glitch Hell.

Map A9 is a real map (Pokémon Lab - Room with scientists (Cinnabar Island), so the Glitch City would be based on that, based on the exit ID of the map you came from, with the block data also being based on the exit ID meaning invalid IDs bring up Glitch Cities.

See http://bulbapedia.bulbagarden.net/wiki/List_of_locations_by_index_number_(Generation_I)

These are interesting but was specifically looking for non-freezing invalid maps, like the ones marked unused on the Bulbapedia article or other invalid destinations.

I later tried hex FE and... Wow, it appears just like attachment 1 if entered via the Celadon Store and as attachments 2 and 3 if entered from the Safari Zone building. It also plays the Cycling Road theme, (Yay for bikes) and forces you to fly to that particular map if it doesn't force you to walk down and it's appearance depends on the map you enter it from, but If you enter it from a building like the Department Store, it doesn't activate the Cycling Road effect, while it does, when entered from a location like a normal house.EDIT:Also, whoops. (Attachment 4) the link didn't include the last character.